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Superplastic deformation of a heat-resistant Al–Cu–Mg–Ag–Mn alloy
- Source :
- Journal of Materials Processing Technology. 209:3300-3305
- Publication Year :
- 2009
- Publisher :
- Elsevier BV, 2009.
-
Abstract
- The superplastic behavior and deformation mechanism of a heat-resistant Al–Cu–Mg–Ag–Mn alloy prepared by ingot metallurgy was investigated by using optical microscopy, scanning electron microscopy and transmission electron microscopy. It is shown that the Al–Cu–Mg–Ag–Mn alloy shows good superplastic properties at temperatures higher than 450 °C and strain rates lower than 10 −2 s −1 . A maximum elongation-to-failure of 320% was observed at 500 °C and 5 × 10 −4 s −1 , where the corresponding strain rate sensitivity index m is 0.58 and the flow stress σ is 5.7 MPa. Microstructure studies revealed that the observed superplastic behavior resulted from severe grain elongation rather than grain boundary sliding. It is suggested that this phenomenon may provide a new concept for developing superplastic materials.
- Subjects :
- Materials science
Metallurgy
Metals and Alloys
Superplasticity
Flow stress
Strain rate
Microstructure
Industrial and Manufacturing Engineering
Computer Science Applications
Deformation mechanism
Modeling and Simulation
Ceramics and Composites
Ingot
Deformation (engineering)
Grain Boundary Sliding
Subjects
Details
- ISSN :
- 09240136
- Volume :
- 209
- Database :
- OpenAIRE
- Journal :
- Journal of Materials Processing Technology
- Accession number :
- edsair.doi...........49e1913b5a1a27ac3b9dc1a27e25ceeb